read_task_attachment

THE RISK

Low Risk

Why read_task_attachment needs a policy

This tool performs read-only data retrieval of task attachments that already exist in OmniFocus. It has no side effects, does not create, modify, delete, or execute any operations. The capability to retrieve image content does not change the read-only nature of the operation.

From the tool's definition Tool name 'read_task_attachment' with description 'Read a task attachment' explicitly indicates retrieval of task attachment data. Returns content (including images as MCP image content) without modifying, deleting, or executing any operations.

Documented attack patterns abuse exactly the kind of access read_task_attachment gives an agent:

POLICY

How to control read_task_attachment

PolicyLayer is an MCP gateway — it sits between your AI agents and OmniFocus MCP Enhanced, and nothing reaches the server without passing your rules. This is the rule we recommend for read_task_attachment:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "read_task_attachment": {}
  }
}

read_task_attachment is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register OmniFocus MCP Enhanced — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More OmniFocus MCP Enhanced tools

Destructive batch_remove_items Remove multiple tasks or projects from OmniFocus in a single operation Destructive remove_item Remove a task or project from OmniFocus Write add_omnifocus_task Add a new task to OmniFocus Write add_project Add a new project to OmniFocus Write batch_add_items Add multiple tasks or projects to OmniFocus in a single operation Write edit_item Edit a task or project in OmniFocus Write move_task Move an existing task to a project, parent task, or inbox Read dump_database Gets the current state of your OmniFocus database

All 18 OmniFocus MCP Enhanced tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about read_task_attachment

What does the read_task_attachment tool do? +

Read a task attachment reported by get_task_by_id. Images are returned as MCP image content when possible. It is categorised as a Read tool in the OmniFocus MCP Enhanced MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_task_attachment? +

Register the OmniFocus MCP Enhanced MCP server in PolicyLayer and add a rule for read_task_attachment: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches OmniFocus MCP Enhanced. Nothing to install.

What risk level is read_task_attachment? +

read_task_attachment is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_task_attachment? +

Yes. Add a rate_limit block to the read_task_attachment rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block read_task_attachment completely? +

Set action: deny in the PolicyLayer policy for read_task_attachment. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides read_task_attachment? +

read_task_attachment is provided by the OmniFocus MCP Enhanced MCP server (jqlts1/omnifocus-mcp-enhanced). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every OmniFocus MCP Enhanced tool call.

Start from OmniFocus MCP Enhanced, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →